Page 506 of 536
Chapter 25 — Fault locating and clearing
553-3121-210
Standard 3.0
January 1999
Possible cause
Action
Defective trunk circuit
card
Hardware disable then re-enable the circuit card to initiate a
self-test. If the test fails, replace the circuit card. If the test passes,
follow the procedure below.
Disconnect the wiring between the circuit card and the
cross-connect terminal.
Enable the TN by entering
LD 32
ENLU c u
(“c u” represents card and unit numbers)
Wait for an OVD message.
If you receive an OVD message, replace the circuit card.
If you do not receive an OVD message, reconnect the wiring and go
to the next possible cause.
Defective wiring
At the main cross-connect terminal, disconnect the wiring to the CO
or other trunk equipment (such as a music source or paging
equipment).
Enable the TN and wait for an OVD message. If you receive an
OVD message, repair or replace the wiring to the PE card.
If there is no OVD message, repair or replace the wiring from the
cross-connect terminal to the trunk.
If the trunk circuit card still will not enable or there is still a trunk
problem, reconnect the wiring and go to the next possible cause.
Enable the TN by entering
LD 32
ENLU c u
(“c u” represents card and unit numbers)
Wait for an OVD message.
If you receive an OVD message, replace the circuit card.
If you do not receive an OVD message, reconnect the wiring and go
to the next possible cause.
—continued—
Содержание Meridian Meridian 1
Страница 3: ...553 3121 210 Standard 3 0 January 1999 ...
Страница 17: ...xiv Contents 553 3121 210 Standard 3 0 January 1999 ...
Страница 89: ...Page 70 of 536 Chapter 6 Bracing cabinets against earthquakes 553 3121 210 Standard 3 0 January 1999 ...
Страница 97: ...Page 78 of 536 Chapter 8 Installing a new system 553 3121 210 Standard 3 0 January 1999 ...
Страница 107: ...Page 88 of 536 Chapter 10 Installing the system ground 553 3121 210 Standard 3 0 January 1999 ...
Страница 113: ...Page 94 of 536 Chapter 11 Installing the power supply 553 3121 210 Standard 3 0 January 1999 ...
Страница 125: ...Page 106 of 536 Chapter 12 Adding an expansion cabinet 553 3121 210 Standard 3 0 January 1999 ...
Страница 139: ...Page 120 of 536 Chapter 13 Installing the circuit cards 553 3121 210 Standard 3 0 January 1999 ...
Страница 157: ...Page 138 of 536 Chapter 15 Installing and connecting SDI and Ethernet ports 553 3121 210 Standard 3 0 January 1999 ...
Страница 175: ...Page 156 of 536 Chapter 16 Starting up and testing the system 553 3121 210 Standard 3 0 January 1999 ...
Страница 209: ...Page 190 of 536 Chapter 18 Connecting the trunks 553 3121 210 Standard 3 0 January 1999 ...
Страница 323: ...Page 304 of 536 Chapter 21 Installing Hospitality 553 3121 210 Standard 3 0 January 1999 ...
Страница 419: ...Page 400 of 536 Chapter 23 Pre programmed data 553 3121 210 Standard 3 0 January 1999 ...
Страница 455: ...Page 436 of 536 Chapter 24 Changing pre programmed data 553 3121 210 Standard 3 0 January 1999 ...
Страница 555: ...Page 536 of 536 Chapter 25 Fault locating and clearing 553 3121 210 Standard 3 0 January 1999 ...